Samsung AVXTJH028EE - Page 109

Troubleshooting
4-18 Samsung Electronics
4-2-2 What to check before diagnosis
4-2-2-1 Lamp combination expression method display (cassette type indoor unit)
- Slim 1 way, 2 way cassette type
■ Error detection and restart
● When error occurs during operation, indicate a problem with LED flashes, and no other operations but LED stops.
● When restarting operation with remote controller or switch, it will determine the appropriate error mode after normal operation
■ LED lamp display with error detection
: On : Flickering : Off
Follow-up measures Causes
LED lamp display
Error type
Power reset
Indoor temperature sensor error
(Open/Short)
Indoor heat exchanger sensor error
Indoor heat exchanger OUT sensor error
Indoor emission temperature sensor error
(Open/Short) : Heater using models
Mixed operation error
Indoor fan motor error: maintains for
over 15 seconds below 450RPM
Outdoor temperature sensor error
COND sensor error
DISCHARGE sensor error
1. Detect the indoor unit when there is
no communication between the indoor
unit and outdoor unit for 2 minutes.
(When communication error is for
over 2 minutes)
2. The indoor unit receives the
communication error signal from the
outdoor unit
3.
The outdoor unit tracking 3 minutes
error
4. When the outdoor unit transmits a
communication error which is caused by
difference between the number of the
installation unit and the number of
communication unit after completion
of tracking. (When communication
error is for over 2 minutes)
When indoor and outdoor
power is on again
t*OEPPSUFNQFSBUVSFTFOTPS
connector breakaway
t4IPSUPGUFNQFSBUVSF
sensor wire
t*OEPPSQJQFUFNQFSBUVSF
sensor connector
breakaway
Operate cooling & heating
operation simultaneously
Not drive the indoor fan
motor
Outdoor unit operation
error
Comm. error
Not an error
t$IFDLUIFJOEPPS 
temperature sensor
connector
t$IFDLUIFUFNQFSBUVSF
sensor wire
t$IFDLUIFUFNQFSBUVSF
sensor connector
breakaway
t$IBOHFUIFPQFSBUJPONPEF
t$IFDLUIFDPOOFDUPS
breakaway
t$IFDLUIFGBONPUPSMPDL
t.BOBHFBGUFSDIFDLJOH
the error on the outdoor
PCB display window
t$IFDLDPNNMJOF
connection
t$IFDL*OEPPSPVUEPPSVOJU
power input
t$IFDL$PNN*$
Green Red
$9;&6+B$BaLQGG 